A unique system to Fluid Transfer:

• Compliant With JIG bulletin No. 58
• The only Fluid Transfer Approved Solution for our Dispensers and Refuellers
• Easily And Safely Retrofitted to all Makes of Aviation Refuelling Vehicles
• No Electrical Components Avoids ATEX Compliance Issues
• Existing Vehicles Differential Pressure Gauge Retained – No Modifications
• No complicated Electrical or PLC Based Installation Required
• No Additional Electrical Pressure Transducers Required
• Universal Fixing Kit Available

This differential pressure shut down safety system is designed to comply with JIG bulletin No. 58 of January 2013, which states that a differential pressure switch must now be fitted to all filter monitors and is also recommended for all filter water separators, in order to automatically cut off fuelling once the differential pressure reaches 22 psi, preventing any possibility of contaminated fuel passing onto an aircraft.

The Fluid Transfer differential pressure shut down system has been designed to be easily and safely retrofitted to all vehicles. The all pneumatic design is "fail safe", and with no electrical components avoids ATEX compliance issues. Installation is simply achieved on refuelling vehicles (of any manufacturer) by tapping into the Ø6mm high and low pressure supply lines to the existing differential pressure gauge. The control box containing the visual detectors, test system and key switches, together with the differential pressure switch, can be mounted to the existing instrument panel or an alternative suitable location.

A pneumatic output is produced by the pressure switch when the critical differential pressure of 22 psi is reached. This pneumatic output disables the deadman system via a pneumatic pilot valve in order to cut off the fuel supply at the pit coupler on a hydrant dispenser or at the in-line pressure control valve on a refueller. Pneumatic indicators display on the control unit which of the 3 states the system is currently in:

• High differential pressure system activated
• High differential pressure system reset
• High differential pressure system override

The differential pressure switch is piped between the high and low pressure Ø6mm gauge lines to the existing differential pressure gauge.